| To: | xen-devel <xen-devel@xxxxxxxxxxxxxxxxxxx> |
|---|---|
| Subject: | [Xen-devel] How to use deeper C state |
| From: | Akio Takebe <takebe_akio@xxxxxxxxxxxxxx> |
| Date: | 2009年1月21日 18:02:59 +0900 |
| Cc: | "Tian, Kevin" <kevin.tian@xxxxxxxxx>, "Yu, Ke" <ke.yu@xxxxxxxxx> |
| Delivery-date: | 2009年1月21日 01:03:34 -0800 |
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Hi, When I tried cpuidle option, max_cstate indicates C7 with debug-key in my machine. But the result of "xenpm start" doesn't say that xen enter C2 or more state. Do I need anything else(boot option and so on)? (XEN) ==cpu0== (XEN) active state: C1 (XEN) max_cstate: C7 (XEN) states: (XEN) *C1: type[C1] latency[000] usage[00409594] duration [1893990621775] (XEN) C0: usage[00409594] duration[22279357433] (XEN) ==cpu1== (XEN) active state: C1 (XEN) max_cstate: C7 (XEN) states: (XEN) *C1: type[C1] latency[000] usage[00396768] duration [1891756608514] (XEN) C0: usage[00396768] duration[24513377367] # xenpm start Elapsed time (ms): 466915 CPU0: residency percentage C0 220 ms 0.05% C1 466695 ms 99.95% P0 60 ms 100.00% P1 0 ms 0.00% CPU1: residency percentage C0 606 ms 0.13% C1 466309 ms 99.87% P0 450 ms 100.00% P1 0 ms 0.00% Best Regards, Akio Takebe _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-devel
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